DuraVent FasNSeal Flex 4" x 30' Stainless Steel Flex Length door-frame Simple to install almost anywhere

Simple to install almost anywhere with no gas line or venting

the door automatically draws to the closed position and locks securely every time

Enhance Indoor/Outdoor Spaces

11" x 8" base

DuraVent FasNSeal Flex 4" x 30' Stainless Steel Flex Length door-frame Simple to install almost anywhereMade from super ferritic stainless steel. Corrosion resistant. Manufactured with a sure seal locking seam for superior strength and flexibility. The smooth inner wall provides for no output reduction, allowing for full appliance efficiency, ease of cleaning and regular maintenance. The smooth inner wall optimizes gas flow, minimizes back pressure, and facilitates condensate management. Only flexible chimney liner listed to UL 1738 standard. What's